Abstract
The iron-catalyzed cycloaddition reaction of alkene-tethered oxime esters with 1,2-disubstituted alkenes afforded tetrahydropyrrolizines, the structural motif often seen in bicyclic alkaloids. The reaction proceeds through consecutive cycloaddition reactions. These include, first, intramolecular cyclization, followed by intermolecular cyclization with a 1,2-disubstituted alkene in a regioselective manner where an imine moiety first generated plays a pivotal role.
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